MATLAB Answers

How to optimize material properties from ANSYS file?

9 ビュー (過去 30 日間)
Pedro Pesante Castro
Pedro Pesante Castro 2021 年 5 月 30 日
回答済み: Steve Grikschat 2021 年 7 月 6 日
Hi everyone,
I've the idea to optimize some material properties (e.g: young modulus, poission ratio and shear modulus) in an ANSYS file.txt using MATLAB. The steps are:
1-Read the ANSYS file in MATLAB.
2-Create a function with a loop to admit multi variable iterations changing these material properties (can be 3 to 9 variables). For this, the ANSYS file has to contain the variables to modify. Then, with the function is possible to put the inputs of each iterations and run the ANSYS scrip.
3-Read and extract the results. Then, determine with which parameters is possible to reduce the error between the experimental test (about the material). It is possible with comparing the force-displacement slope. For this step, (with my little knowledge) I think to use fminsearch or fmincon.
I hope my explain was clear.
Do you have some ideas to realize this procedure or have you seen any similar work? Which optimization algorithm is better for this?
I appreciate any help :)

回答 (1 件)

Steve Grikschat
Steve Grikschat 2021 年 7 月 6 日
Hi Pedro,
The overall approach you've described makes sense and I have seen similar approaches work successfully.
For example, this talk covers a case performing optimizaton on a CAD model
(although the FEA is done in MATLAB in this case, I think the idea extends).
Here are some other resources specifically on ANSYS:
Directly run ANSYS in batch mode from MATLAB using the approach outlined in this paper: Integration of MATLAB and ANSYS for Advanced Analysis of Vehicle Structures. This YouTube video also shows a similar method: Using MATLAB to run (ANSYS) APDL macro code
Without knowing a lot about the domain, I can't comment with any certainty about the optimization objective.
My perspective on the optimization solver is that you can try a gradient-based solver (like fmincon) first, but just know that if the gradient estimate is unreliable or noisy due to simulations, then you will need a derivative-free solver like those in Global Optimization Toolbox (like ga, patternsearch, or surrogateopt). The documentation discusses this briefly.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by